Skanda Purana 6.2.85.11

6.2.85.11

10 atha karkoṭakeśvaraliṃgamāhātmyavarṇanam, tatra mātṛdattaśāpavināśārtha karkoṭakanāgena mahākālavane tapaścaraṇam, tattapaḥprasannena śivena tasmai varapradānam, śivaliṃgasya svanāmnā sthāpanam, karkoṭakeśvaraliṃgamāhātmyavarṇanam... 88 1

10. Now, the description of the glory of the Karkoṭakeśvara liṅga; therein, the snake Karkoṭaka practicing austerity in the Mahākāla forest to destroy a curse given by his mother; Śiva, pleased by that austerity, granting a boon to him; the installation of a Śivaliṅga in his own name; the description of the glory of the Karkoṭakeśvara liṅga. 88 1